Looks like captain America has an avengers teaser once the credits have rolled.

Quote:

So what is post-credits? A teaser trailer for "The Avengers" it would seem. The trailer, which reportedly wasn't shown at the domestic press screenings, starts with "Chris Evans punching a bag in the gym and eventually punches the bag so hard it breaks. Nick Fury walks in and asks him “If he is having trouble sleeping and tells him he has a mission for him."

It then "shows all of the characters one by one and ends with Thor throwing his hammer". There's a brief shot of Mark Ruffalo but no sign of the Hulk, and Loki does apparently appear in one of the scenes shown.